Another 12 of the injured are also Colombian but “out of danger,” the foreign ministry said.

The bus, which had foreign license plates, overturned and crashed into three houses after a collision with an all-terrain vehicle.

Three of the four Ecuadorans in the all-terrain vehicle were among the dead, which included three children.

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Colombia’s Transport Ministry had said on Tuesday that the bus was not authorized to carry tourists.

Traffic accidents are among the leading causes of death in Ecuador. According to the watchdog group Justicia Vial, on average seven people are killed and some 80 people injured each day in traffic accidents.